Bhagavad Gita 2.67
इन्द्रियाणां हि चरतां यन्मनोऽनुविधीयते।
तदस्य हरति प्रज्ञां वायुर्नावमिवाम्भसि।।2.67।।
Indriyanam hi charatam yanmanonuvidhiyate
Tadasya harati pragyam vayurnavamivambhasi
Simple meaning, written by AIWhatever the wandering mind clings to among the senses destroys its intelligence, like wind that wrecks a boat on water.